Messages in this thread | | | Subject | Re: [PATCH v2] MIPS/bpf: Enable bpf_probe_read{, str}() on MIPS again | From | Tiezhu Yang <> | Date | Mon, 22 Mar 2021 15:12:59 +0800 |
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On 03/22/2021 12:46 PM, Maciej W. Rozycki wrote: > On Thu, 18 Mar 2021, Tiezhu Yang wrote: > >> diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig >> index 160b3a8..4b94ec7 100644 >> --- a/arch/mips/Kconfig >> +++ b/arch/mips/Kconfig >> @@ -6,6 +6,7 @@ config MIPS >> select ARCH_BINFMT_ELF_STATE if MIPS_FP_SUPPORT >> select ARCH_HAS_FORTIFY_SOURCE >> select ARCH_HAS_KCOV >> + select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE > Hmm, documentation on ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE seems rather > scarce, but based on my guess shouldn't this be "if !EVA"? > > Maciej
I do not quite know what the effect if MIPS EVA (Enhanced Virtual Addressing) is set, I saw that ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE should be restricted to archs with non-overlapping address ranges.
I wonder whether MIPS EVA will generate overlapping address ranges? If yes, it is better to make ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE depend on !EVA on MIPS.
Thanks, Tiezhu
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